The type of wax I am using is Paraffin Wax general purpose, The wicks are 9" Pre-waxed Medium Wire Wick, The FO is Hot Cocoa and I only put in about an 1/8 oz. for a 1/2 pd of wax, Temp is about 170 degs. and yes I did put in Swiss Miss Milk Chocolate with marshmallows mix and the cups are clean and I did not touch the inside.